Low temperature liquid phase epitaxy of silicon thin films was successfully carried out at a temperature of (400～500)℃,using Au/Bi alloy as a Si-saturated Sn solution was used to protect the substrate surface,preven...Low temperature liquid phase epitaxy of silicon thin films was successfully carried out at a temperature of (400～500)℃,using Au/Bi alloy as a Si-saturated Sn solution was used to protect the substrate surface,preventing effectively the oxidation of silicon.The grown Si thin films were identified by SEM,AES and C-V measurements.展开更多
High temperatures of the asphalt concrete pavements in summer contribute to the heat island phenomenon in the urban areas. The effective cool-pavement technologies are sought to mitigate the pavement environment. In t...High temperatures of the asphalt concrete pavements in summer contribute to the heat island phenomenon in the urban areas. The effective cool-pavement technologies are sought to mitigate the pavement environment. In this paper, developed heat-reflective pavements are constructed from open-graded asphalt concrete, in which voids in the upper part of the pavement are filled with a cement mortar, containing recycled materials as a fine aggregate. The recycled materials used in this study are： crushed oyster shells, roof tile debris, pottery debris, glass cullet, crushed escallops and coral sand. The temperature reduction of the pavement surfaces at an open site is measured in the summer. The results show that the maximum surface temperature of the pavements falls by approximately 8-10 ℃ compared to the asphalt concrete pavement. Furthermore, it is found that the temperature reduction is mainly due to the increased solar radiation reflectance of the pavement surface.展开更多
文摘Low temperature liquid phase epitaxy of silicon thin films was successfully carried out at a temperature of (400～500)℃,using Au/Bi alloy as a Si-saturated Sn solution was used to protect the substrate surface,preventing effectively the oxidation of silicon.The grown Si thin films were identified by SEM,AES and C-V measurements.
文摘High temperatures of the asphalt concrete pavements in summer contribute to the heat island phenomenon in the urban areas. The effective cool-pavement technologies are sought to mitigate the pavement environment. In this paper, developed heat-reflective pavements are constructed from open-graded asphalt concrete, in which voids in the upper part of the pavement are filled with a cement mortar, containing recycled materials as a fine aggregate. The recycled materials used in this study are： crushed oyster shells, roof tile debris, pottery debris, glass cullet, crushed escallops and coral sand. The temperature reduction of the pavement surfaces at an open site is measured in the summer. The results show that the maximum surface temperature of the pavements falls by approximately 8-10 ℃ compared to the asphalt concrete pavement. Furthermore, it is found that the temperature reduction is mainly due to the increased solar radiation reflectance of the pavement surface.
